AppArmor: add rules needed with additional mediation features brought by Linux 4.14.

examples/apparmor/libvirt-qemu

@@ -16,6 +16,10 @@
   network inet stream,
   network inet6 stream,
 
+  ptrace (readby, tracedby) peer=/usr/sbin/libvirtd,
+
+  signal (receive) peer=/usr/sbin/libvirtd,
+
   /dev/net/tun rw,
   /dev/kvm rw,
   /dev/ptmx rw,

examples/apparmor/usr.sbin.libvirtd

@@ -34,6 +34,7 @@
   network inet dgram,
   network inet6 stream,
   network inet6 dgram,
+  network netlink raw,
   network packet dgram,
   network packet raw,
 
@@ -42,6 +43,9 @@
   ptrace (trace) peer=/usr/sbin/dnsmasq,
   ptrace (trace) peer=libvirt-*,
 
+  signal (send) peer=/usr/sbin/dnsmasq,
+  signal (read, send) peer=libvirt-*,
+
   # Very lenient profile for libvirtd since we want to first focus on confining
   # the guests. Guests will have a very restricted profile.
   / r,